<button class="button">Sign Up</button>

<style>
/* From Uiverse.io by zanina-yassine  - Tags: blue, minimalist, gradient, button, hover, rounded, dark, glow */
.button {
  min-width: 120px;

  position: relative;
  cursor: pointer;

  padding: 12px 17px;
  border: 0;
  border-radius: 7px;

  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.1);
  background: radial-gradient(
    ellipse at bottom,
    rgba(71, 81, 92, 1) 0%,
    rgba(11, 21, 30, 1) 45%
  );

  color: rgb(255, 255, 255, 0.66);

  transition: all 1s cubic-bezier(0.15, 0.83, 0.66, 1);
}

.button::before {
  content: "";
  width: 70%;
  height: 1px;

  position: absolute;
  bottom: 0;
  left: 15%;

  background: rgb(255, 255, 255);
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0) 0%,
    rgba(255, 255, 255, 1) 50%,
    rgba(255, 255, 255, 0) 100%
  );
  opacity: 0.2;

  transition: all 1s cubic-bezier(0.15, 0.83, 0.66, 1);
}

.button:hover {
  color: rgb(255, 255, 255, 1);
  transform: scale(1.1) translateY(-3px);
}

.button:hover::before {
  opacity: 1;
}

</style>
    